"He asked her if she needed a ride," Marshfield Police Chief Phil Tavares said. "She said, 'No thank you,' and he pulled up again and opened the door and said, 'C'mon, I'll give you a ride.'"

That's when the girl climbed in, and police said he drove her around for an hour or two, plying her with alcohol before he brought her to his Ferry Street home.

At that point he sexually assaulted and raped the girl, police said.

Police said the teenager came forward immediately and helped officers identify her attacker. Tavares said Regan was not cooperative, so investigators executed a search warrant and obtained evidence from his home and vehicle.

Regan turned himself in to police Sunday night with his attorney present.

Police said the concern now is whether there are other victims.

"In this particular case, we're actively investigating where he works, and we're concerned that he may work within an organization with young children," Tavares said.

Police said they want to speak to anyone who thinks they may have been assaulted by him in the past, or anyone who may have additional information about the incident.

Lawyers for the Boston Marathon bomber prepared to rest their case Tuesday after an FBI fingerprint examiner testified that Dzhokhar Tsarnaev's fingerprints weren't found on any of the marathon bomb components, but his older brother's were.